I'm running Maure Castle as a successor campaign to the Return to the Temple of Elemental Evil. The party entered the dungeon around 12th level (with about half of those being survivors of Elemental Evil) and are now about 13th level. I've accumulated four deaths.
* Willum, Cleric of Pelor: Willum had his sex changed to female and alignment turned to chaotic evil by the belt of giant strength and cap of opposite alignment found in the Weaver's Chamber This drove "Williana" silently insane, and as the adventurers spread out to explore the rest of the level, she decided to murder her ally and then flee the dungeon. Near the amber pool, as she and the loremaster Alistair were examining the chalice on the center pedastal, WIlliana pushed the mage into the water. This immediately caused the hetfish to swarm and attack. The mage screamed out for help, the rest of the party arrives and Williana successfully bluffs them into thinking that Alistair's was driven mad by the sudden transformation of his robe of eyes into a robe of vermin and that it was the gnolls elsewhere on the level that did it. The party believed her, at least for a moment, and let passed to hunt down the gnolls. Once they got Alistair out of the water though, they realized their mistake and ran after Willian, who was trying to flee through the Unopenable Doors. She turned and fought the others as they closed, and ultimately fell to the quickened blade of Ian, the party's ranger/rogue.
* Ian, Ranger/Rogue: Turned to stone by a blow from the stone golem's cockatrice whip in the statue area of the Great Hall. He was thankful for this, as it kept him from being killed outright as the rest of the party fled the golem and the dungeon. He was later restored to his true form. This was very nearly a TPK, and only a well-timed and well-placed <i>wall of force</i> allowed them to escape.
* Gaiseric, the Rapscallion of Greyhawk, aka "Scrappy": Killed by the symbols of death hidden behind the Tapestry of the Lost City within Tomorast's Hold when he lifted up said tapestry. He is later raised and decides to retire from adventuring.
* Seamus, Wizardly Monk: Killed by the self-same lifting of the trapped tapestry by Gaiseric.
* Sven, Terramancer: The elementalist *nearly* died when he decided that his elemental protections should be more than enough to protect him from the pool of acid ... and then was very surprised at the sound of 20d6 being rolled. He barely made it out of the pool alive.
The party is preparing to enter the third level now, having just succeeded in unlocking the Shadow Vault in their previous outing to the dungeon.
My hook for the party's being in the dungeon is to stop the Cult of Death Undying (a group of powerful necromancers and their followers) from finding the hidden portal to the Fading Land of Necros (demiplane ruled by various undead). This effectively means that there's a rival group of evil adventurers trying to explore Maure Castle as well, and occasionally leaving behind undead monstrocities for the party to deal with. The party had been ahead of the cultists for a while (the cultists are having just as hard a time with it as they are) but now the party has been out of the dungeon for three months.
In that time the Death Unying cultists have pushed into the third level and fought the forces there, but ultimately been driven back by a personal counterassault by Eli. As they fled they raised undead minions to secure (or at least hinder re-occupation) of the 1st and 2nd levels).
Real-life complications often keep the party mages from showing up for adventures, so I created an NPC to aid them, Jakob Dworkin, Cleric of Dalt (which, having just read "The Greater Halls" may turn out to be a good move on my part (though I suspect he may need to be "disappeared" before the party to the Statuary, as I don't want them to be overly reliant on him for teleporation solutions they should come up with themselves).
Steve's suggestion about using "gaurds and wards" is brilliant, I plan on using that in my next session to make life a little more ... interesting for the party. If they want to take 3 month breaks in-game breaks from exploring the dungeons, then they need to assume that the inhabitants of those dungeons are going to react.
We return to Maure Castle on Friday, so my death toll may be up by Saturday. :)